Digestive Respiratory Circulatory and Excretory Your body requires constant oxygen and nutrients But it must get rid of carbon dioxide and other waster your blood helps with both good and bad Your blood carries oxygen and nutrients to the cells And it takes carbon dioxide and waste away In the lungs exchange of gases occur Between the blood and the alveoli This gas exchange is taking oxygen and Releasing carbon dioxide Around the alveoli are capillaries Around both are ultra thin walls They allow the exchange of gases between the air and blood In the capillaries oxygen from the air is taken up by red blood cells Your blood also releases carbon dioxide into the lungs Which is released when you exhale During digestion food is broken down into nutrients Once absorbed nutrients move into the blood This creates energy which is made available Solid waste passes from the digestive system out of the body To get of waster The body involves the lungs large intestine and kidneys Your lungs remove carbon dioxide Your large intestine removes solid waste Your kidneys remove liquid waste Circulatory and Respiratory Your blood flows through your body in arteries and veins These vessels supply oxygen to your brain Blue blood needs oxygen so it heads to your heart Red blood travels throughout your body which is smart Oxygen comes as you breathe in through your trachea and lungs The air flows to the vessels by way of bronchial tubes that branch from the back end of your tongue

Bronchial tubes branch into alveoli Which put oxygen in your in your bloodstream so you can stay alive This process is diffusion Don t let there be confusion On this illusion of diffusion Circulatory and Digestive The digestive system takes in the nutrients that the circulatory spreads The circulatory carries chemical signals from endocrine within to control the speed of food procession Digestive breaks down food and takes in good Your circulatory transports gases and nutrition like it should Together they keep you working great By working in a constant state Both of these systems work together To bring nutrients to the cells They may not actually convert food to energy But like a magician it is like magic The circulatory system needs digestion to occur So it can continue to function Your body needs the nutrients delivered through the blood That was broken down by the digestive system Circulatory and Excretory The blood running through the body Passes through the kidneys Urea uric acid and water is removed Then put pack in your system This is your endocrine system A major controller of your excretory system The kidney function is always altered Allowing for proper function of your cells Your blood in your body Passes through one of your two kidneys

This gives the kidneys what they need In return the excretory system Helps the circulatory system by Getting rid of carbon dioxide Circulatory and Nervous The circulatory needs The messages sent by the nervous system To keep the blood running Together they control heart rate and blood pressure They are all possible through nerve messages All connected in the lymphatic system When your adrenaline kicks in Your nerves have sent the message Your heart pumps faster You work much harder The nervous system is responsible for Heart and fluid functions Without this system The blood does not flow It needs these messages from the brain and spinal cord Skeletal and Nervous Bones have calcium that all nerves need Vertebrae protect the spinal cord from injury It s all part of the skeletal system which produces blood cells Together they keep the nervous system working well Sensory receptors between the bones Send signals about the body position to the brain so that it knows The muscles make bones bend By messages that your motor neurons send The skeletal system protects your nerves And give you the protection that you deserve

Your nervous system sends alerts When your bones are hurt When your bones break don t be in fear Your nervous system is here